40649473 has 4 divisors (see below), whose sum is σ = 40796500. Its totient is φ = 40502448.

The previous prime is 40649471. The next prime is 40649489. The reversal of 40649473 is 37494604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5992704 + 34656769 = 2448^2 + 5887^2 .

It is a cyclic number.

It is not a de Polignac number, because 40649473 - 2¹ = 40649471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40649471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73098 + ... + 73651.

It is an arithmetic number, because the mean of its divisors is an integer number (10199125).

Almost surely, 2^40649473 is an apocalyptic number.

It is an amenable number.

40649473 is a deficient number, since it is larger than the sum of its proper divisors (147027).

40649473 is a wasteful number, since it uses less digits than its factorization.

40649473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147026.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 40649473 is about 6375.6939230173. The cubic root of 40649473 is about 343.8362327791.

The spelling of 40649473 in words is "forty million, six hundred forty-nine thousand, four hundred seventy-three".